Correlations Flashcards
1
Q
What do r values range from?
A
-1 to +1
2
Q
What does the line of best fit represent?
A
Represents the relationship
3
Q
What is a residual?
A
The difference between raw data point and line of best fit
4
Q
What do small residuals indicate?
A
a more accurate model
5
Q
What does the line of best fit do?
A
residuals are minimised
6
Q
What test do you run if you’re looking for a correlation after controlling for a confound?
A
A partial correlation
7
Q
How do you compare correlations?
A
Z statistic
8
Q
When should you use a Z-stat?
A
only to compare correlations from independent groups
